What is the "plain error" standard of review in the context of a motion to overturn a finding of error at the Court of Appeal?

^3. Under the plain-error standard of review, "an appellate court may, in its discretion, correct an error not raised at trial only where the appellant demonstrates that (1) there is an error; (2) the error is clear or obvious, rather than subject to reasonable dispute; (3) the error affected the appellant's substantial rights, which in the ordinary case means it affected the outcome of the district court proceedings; and (4) the error seriously affects the fairness, integrity or public reputation of judicial proceedings." United States v. Rodriguez, 775 F.3d 533, 536 (2d Cir. 2014) (internal quotation marks and alterations omitted).